WO2023022529A1 - Procédé et appareil d'émission et de réception de canal de commande de liaison descendante physique (pdcch) dans un système de communication sans fil - Google Patents

Procédé et appareil d'émission et de réception de canal de commande de liaison descendante physique (pdcch) dans un système de communication sans fil Download PDF

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WO2023022529A1
WO2023022529A1 PCT/KR2022/012316 KR2022012316W WO2023022529A1 WO 2023022529 A1 WO2023022529 A1 WO 2023022529A1 KR 2022012316 W KR2022012316 W KR 2022012316W WO 2023022529 A1 WO2023022529 A1 WO 2023022529A1
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coreset
base station
information
sfn
serving cells
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PCT/KR2022/012316
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English (en)
Korean (ko)
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김규석
강지원
정재훈
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving a physical downlink control channel (PDCCH) in a wireless communication system.
  • PDCH physical downlink control channel
  • Mobile communication systems have been developed to provide voice services while ensuring user activity.
  • the mobile communication system has expanded its scope to data services as well as voice.
  • the explosive increase in traffic causes a shortage of resources and users demand higher-speed services, so a more advanced mobile communication system is required. there is.
  • next-generation mobile communication system The requirements of the next-generation mobile communication system are to support explosive data traffic, drastic increase in transmission rate per user, significantly increased number of connected devices, very low end-to-end latency, and high energy efficiency.
  • Dual Connectivity Massive MIMO (Massive Multiple Input Multiple Output), In-band Full Duplex, Non-Orthogonal Multiple Access (NOMA), Super Wideband Wideband) support, various technologies such as device networking (Device Networking) are being studied.
  • Massive MIMO Massive Multiple Input Multiple Output
  • NOMA Non-Orthogonal Multiple Access
  • Super Wideband Wideband various technologies such as device networking (Device Networking) are being studied.
  • a technical problem of the present disclosure is to provide a method and apparatus for transmitting and receiving a PDCCH in a wireless communication system.
  • an additional technical problem of the present disclosure is a single frequency network (SFN) method for a control resource set (CORESET) of a plurality of serving cells in which a transmission configuration indicator (TCI) state is simultaneously updated ( It is to provide a method and apparatus for setting a scheme).
  • SFN single frequency network
  • CORESET control resource set
  • TCI transmission configuration indicator
  • an additional technical problem of the present disclosure is to provide a method and apparatus for setting a plurality of TCI states for the CORESET of the plurality of serving cells.
  • the state of at least one transmission configuration indicator is simultaneously updated.
  • SFN single frequency network
  • CORESET first control resource set
  • the SFN scheme is configured for at least one serving cell other than the first serving cell among the plurality of serving cells.
  • one or more specific CORESETs having the same index as the first CORESET may be set.
  • the state of at least one transmission configuration indicator is simultaneously Transmitting first setting information related to a serving cell list including a plurality of serving cells to be updated to a terminal; Transmitting first information for setting a single frequency network (SFN) scheme for a first control resource set (CORESET) of a first serving cell among the plurality of serving cells to the terminal; And transmitting the PDCCH to the terminal based on the SFN scheme in the first CORESET, wherein the SFN scheme is configured for at least one serving cell other than the first serving cell among the plurality of serving cells.
  • one or more specific CORESETs having the same index as the first CORESET may be set.
  • a method and apparatus for transmitting and receiving a PDCCH in a wireless communication system may be provided.
  • a method and apparatus for configuring an SFN scheme for CORESET of a plurality of serving cells in which TCI states are simultaneously updated may be provided.
  • a method and apparatus for setting a plurality of TCI states for the CORESET of the plurality of serving cells may be provided.
  • FIG. 1 illustrates the structure of a wireless communication system to which the present disclosure may be applied.
  • FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.
  • FIG 3 illustrates a resource grid in a wireless communication system to which the present disclosure may be applied.
  • FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure may be applied.
  • FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure may be applied.
  • FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission/reception method using them.
  • FIG. 7 is a diagram illustrating downlink transmission and reception operations in a wireless communication system to which the present disclosure may be applied.
  • FIG 8 illustrates a multiple TRP transmission scheme in a wireless communication system to which the present disclosure can be applied.
  • FIG. 9 shows an example of a MAC CE for indicating a TCI state to which the present disclosure can be applied.
  • FIG. 10 is a diagram for explaining an operation of receiving a PDCCH of a terminal in a wireless communication system to which the present disclosure can be applied.
  • FIG. 11 is a diagram for explaining an operation of transmitting a PDCCH of a base station in a wireless communication system to which the present disclosure can be applied.
  • FIG. 12 is a diagram for explaining a signaling procedure of a network side and a terminal according to an embodiment of the present disclosure.
  • FIG. 13 illustrates a block configuration diagram of a wireless communication device according to an embodiment of the present disclosure.
  • first and second are used only for the purpose of distinguishing one component from another component and are not used to limit the components, unless otherwise specified. The order or importance among them is not limited. Accordingly, within the scope of the present disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment may be referred to as a first component in another embodiment. can also be called
  • the present disclosure describes a wireless communication network or wireless communication system, and operations performed in the wireless communication network control the network and transmit or receive signals in a device (for example, a base station) in charge of the wireless communication network. It may be performed in the process of receiving, or in the process of transmitting or receiving signals from a terminal coupled to the corresponding wireless network to a network or between terminals.
  • a device for example, a base station
  • transmitting or receiving a channel includes the meaning of transmitting or receiving information or a signal through a corresponding channel.
  • transmitting a control channel means transmitting control information or a signal through the control channel.
  • transmitting a data channel means transmitting data information or a signal through the data channel.
  • downlink means communication from a base station to a terminal
  • uplink means communication from a terminal to a base station.
  • a transmitter may be part of a base station and a receiver may be part of a terminal.
  • a transmitter may be a part of a terminal and a receiver may be a part of a base station.
  • a base station may be expressed as a first communication device
  • a terminal may be expressed as a second communication device.
  • a base station includes a fixed station, a Node B, an evolved-NodeB (eNB), a Next Generation NodeB (gNB), a base transceiver system (BTS), an access point (AP), and a network (5G Network), AI (Artificial Intelligence) system/module, RSU (road side unit), robot, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.
  • AI Artificial Intelligence
  • RSU road side unit
  • robot UAV: Unmanned Aerial Vehicle
  • AR Algmented Reality
  • VR Virtual Reality
  • a terminal may be fixed or mobile, and a user equipment (UE), a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), and an advanced mobile (AMS) Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device, vehicle, RSU (road side unit), It can be replaced with terms such as robot, AI (Artificial Intelligence) module, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.
  • AI Artificial Intelligence
  • drone UAV: Unmanned Aerial Vehicle
  • AR Algmented Reality
  • VR Virtual Reality
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with a radio technology such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented with radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA).
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA
  • LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE.
  • 3GPP NR New Radio or New Radio Access Technology
  • 3GPP LTE/LTE-A/LTE-A pro is an evolved version of 3GPP LTE/LTE-A/LTE-A pro.
  • LTE refers to technology after 3GPP Technical Specification (TS) 36.xxx Release 8.
  • TS Technical Specification
  • LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A
  • LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro
  • 3GPP NR refers to technology after TS 38.xxx Release 15.
  • LTE/NR may be referred to as a 3GPP system.
  • "xxx" means standard document detail number.
  • LTE/NR may be collectively referred to as a 3GPP system.
  • TS 36.211 Physical Channels and Modulation
  • TS 36.212 Multiplexing and Channel Coding
  • TS 36.213 Physical Layer Procedures
  • TS 36.300 General Description
  • TS 36.331 Radio Resource Control
  • TS 38.211 Physical Channels and Modulation
  • TS 38.212 Multiplexing and Channel Coding
  • TS 38.213 Physical Layer Procedures for Control
  • TS 38.214 Physical Layer Procedures for Data
  • TS 38.300 General description of NR and New Generation-Radio Access Network (NG-RAN)
  • TS 38.331 Radio Resource Control Protocol Specification
  • channel state information - reference signal resource indicator channel state information - reference signal resource indicator
  • channel state information - reference signal channel state information - reference signal
  • Layer 1 reference signal received quality Layer 1 reference signal received quality
  • orthogonal frequency division multiplexing orthogonal frequency division multiplexing (orthogonal frequency division multiplexing)
  • radio resource control radio resource control
  • Synchronization signal block including primary synchronization signal (PSS), secondary synchronization signal (SSS) and physical broadcast channel (PBCH)
  • NR is an expression showing an example of 5G RAT.
  • a new RAT system including NR uses an OFDM transmission scheme or a transmission scheme similar thereto.
  • the new RAT system may follow OFDM parameters different from those of LTE.
  • the new RAT system follows the numerology of the existing LTE/LTE-A as it is, but may support a larger system bandwidth (eg, 100 MHz).
  • one cell may support a plurality of numerologies. That is, terminals operating with different numerologies can coexist in one cell.
  • a numerology corresponds to one subcarrier spacing in the frequency domain.
  • Different numerologies can be defined by scaling the reference subcarrier spacing by an integer N.
  • FIG. 1 illustrates the structure of a wireless communication system to which the present disclosure may be applied.
  • the NG-RAN is an NG-RA (NG-Radio Access) user plane (ie, a new AS (access stratum) sublayer / PDCP (packet data convergence protocol) / RLC (radio link control) / MAC / PHY) and control plane (RRC) protocol termination to the UE.
  • the gNBs are interconnected through an Xn interface.
  • the gNB is also connected to a New Generation Core (NGC) through an NG interface. More specifically, the gNB is connected to an Access and Mobility Management Function (AMF) through an N2 interface and to a User Plane Function (UPF) through an N3 interface.
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.
  • An NR system can support multiple numerologies.
  • numerology may be defined by subcarrier spacing and cyclic prefix (CP) overhead.
  • the multiple subcarrier spacing can be derived by scaling the basic (reference) subcarrier spacing by an integer N (or ⁇ ).
  • N or ⁇
  • the numerology used can be selected independently of the frequency band.
  • various frame structures according to a plurality of numerologies may be supported.
  • OFDM numerology and frame structure that can be considered in the NR system will be described.
  • Multiple OFDM numerologies supported in the NR system can be defined as shown in Table 1 below.
  • NR supports multiple numerologies (or subcarrier spacing, SCS) to support various 5G services. For example, when SCS is 15 kHz, a wide area in traditional cellular bands support, dense-urban, lower latency and wider carrier bandwidth when SCS is 30kHz/60kHz, and phase when SCS is 60kHz or higher To overcome phase noise, it supports a bandwidth greater than 24.25 GHz.
  • the NR frequency band is defined as two types (FR1, FR2) of frequency range.
  • FR1 and FR2 are as follows It may be configured as shown in Table 2. Also, FR2 may mean millimeter wave (mmW).
  • T TA (N TA +N TA,offset )T c before the start of the corresponding downlink frame in the corresponding terminal.
  • slots are numbered in increasing order of n s ⁇ ⁇ 0,..., N slot subframe, ⁇ -1 ⁇ within a subframe, and within a radio frame They are numbered in increasing order n s,f ⁇ ⁇ 0,..., N slot frame, ⁇ -1 ⁇ .
  • One slot is composed of consecutive OFDM symbols of N symb slots , and N symb slots are determined according to CP.
  • the start of slot n s ⁇ in a subframe is temporally aligned with the start of OFDM symbol n s ⁇ N symb slot in the same subframe. Not all terminals can simultaneously transmit and receive, which means that not all OFDM symbols in a downlink slot or uplink slot can be used.
  • Table 3 shows the number of OFDM symbols per slot (N symb slot ), the number of slots per radio frame (N slot frame, ⁇ ), and the number of slots per subframe (N slot subframe, ⁇ ) in the general CP.
  • Table 4 represents the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.
  • one subframe may include 4 slots.
  • a mini-slot may include 2, 4, or 7 symbols, more or less symbols.
  • an antenna port antenna port
  • resource grid resource element
  • resource block carrier part, etc.
  • the antenna port is defined such that the channel on which a symbol on the antenna port is carried can be inferred from the channel on which other symbols on the same antenna port are carried. If the large-scale properties of the channel on which the symbols on one antenna port are carried can be inferred from the channel on which the symbols on the other antenna port are carried, then the two antenna ports are quasi co-located or QC/QCL (quasi co-located or quasi co-location).
  • the wide range characteristic includes one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.
  • a resource grid is composed of N RB ⁇ N sc RB subcarriers in the frequency domain, and one subframe is composed of 14 2 ⁇ OFDM symbols.
  • a transmitted signal is described by one or more resource grids consisting of N RB ⁇ N sc RB subcarriers and 2 ⁇ N symb ( ⁇ ) OFDM symbols.
  • N RB ⁇ ⁇ N RB max, ⁇ The N RB max, ⁇ represents the maximum transmission bandwidth, which may vary not only between numerologies but also between uplink and downlink.
  • one resource grid may be set for each ⁇ and antenna port p.
  • Each element of the resource grid for ⁇ and antenna port p is referred to as a resource element and is uniquely identified by an index pair (k, l').
  • l' 0,...,2 ⁇ N symb ( ⁇ ) -1 is a symbol in a subframe indicates the location of
  • an index pair (k,l) is used.
  • l 0,...,N symb ⁇ -1.
  • the resource element (k,l') for ⁇ and antenna port p corresponds to a complex value a k,l' (p, ⁇ ) . If there is no risk of confusion, or if a particular antenna port or numerology is not specified, the indices p and ⁇ can be dropped, resulting in a complex value of a k,l' (p) or It can be a k,l' .
  • Point A serves as a common reference point of the resource block grid and is obtained as follows.
  • OffsetToPointA for primary cell (PCell) downlink represents the frequency offset between point A and the lowest subcarrier of the lowest resource block overlapping the SS/PBCH block used by the UE for initial cell selection. It is expressed in resource block units assuming a 15 kHz subcarrier spacing for FR1 and a 60 kHz subcarrier spacing for FR2.
  • - absoluteFrequencyPointA represents the frequency-location of point A expressed as in ARFCN (absolute radio-frequency channel number).
  • Common resource blocks are numbered upwards from 0 in the frequency domain for the subcarrier spacing setting ⁇ . do.
  • the center of subcarrier 0 of common resource block 0 for subcarrier interval setting ⁇ coincides with 'point A'.
  • Equation 1 the relationship between the common resource block number n CRB ⁇ and the resource elements (k, l) for the subcarrier spacing ⁇ is given by Equation 1 below.
  • Physical resource blocks are numbered from 0 to N BWP,i size, ⁇ -1 within a bandwidth part (BWP), where i is the number of BWP.
  • BWP bandwidth part
  • Equation 2 The relationship between the physical resource block n PRB and the common resource block n CRB in BWP i is given by Equation 2 below.
  • N BWP,i start, ⁇ is a common resource block where BWP starts relative to common resource block 0.
  • Figure 4 illustrates a physical resource block in a wireless communication system to which the present disclosure may be applied.
  • Figure 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.
  • a slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot includes 6 symbols.
  • a carrier includes a plurality of subcarriers in the frequency domain.
  • a resource block (RB) is defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain.
  • a bandwidth part (BWP) is defined as a plurality of contiguous (physical) resource blocks in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.).
  • a carrier may include up to N (eg, 5) BWPs. Data communication is performed through an activated BWP, and only one BWP can be activated for one terminal.
  • Each element in the resource grid is referred to as a resource element (RE), and one complex symbol may be mapped.
  • RE resource element
  • the NR system can support up to 400 MHz per component carrier (CC). If a terminal operating in such a wideband CC always operates with radio frequency (RF) chips for the entire CC turned on, battery consumption of the terminal may increase.
  • a terminal operating in such a wideband CC always operates with radio frequency (RF) chips for the entire CC turned on, battery consumption of the terminal may increase.
  • RF radio frequency
  • different numerologies eg subcarrier spacing, etc.
  • the capability for the maximum bandwidth may be different for each terminal.
  • the base station may instruct the terminal to operate only in a part of the bandwidth of the wideband CC rather than in the entire bandwidth, and the part of the bandwidth is defined as a bandwidth part (BWP) for convenience.
  • BWP may be composed of consecutive RBs on the frequency axis and may correspond to one numerology (eg, subcarrier spacing, CP length, slot/mini-slot period).
  • the base station may set multiple BWPs even within one CC configured for the terminal. For example, in a PDCCH monitoring slot, a BWP occupying a relatively small frequency domain may be configured, and a PDSCH indicated by the PDCCH may be scheduled on a larger BWP. Alternatively, when UEs are concentrated in a specific BWP, some UEs may be set to other BWPs for load balancing. Alternatively, considering frequency domain inter-cell interference cancellation between neighboring cells, a part of the spectrum from the entire bandwidth may be excluded and both BWPs may be set even within the same slot. That is, the base station may configure at least one DL/UL BWP for a terminal associated with a wideband CC.
  • the base station may activate at least one DL/UL BWP among the configured DL/UL BWP(s) at a specific time (by L1 signaling or MAC Control Element (CE) or RRC signaling).
  • the base station may indicate switching to another configured DL / UL BWP (by L1 signaling or MAC CE or RRC signaling).
  • a timer value expires based on a timer, it may be switched to a predetermined DL/UL BWP.
  • the activated DL/UL BWP is defined as an active DL/UL BWP.
  • the terminal In situations such as when the terminal is performing an initial access process or before an RRC connection is set up, it may not be possible to receive the configuration for DL / UL BWP, so in this situation, the terminal This assumed DL/UL BWP is defined as the first active DL/UL BWP.
  • FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission/reception method using them.
  • a terminal receives information from a base station through downlink, and the terminal transmits information to the base station through uplink.
  • Information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist according to the type/use of the information transmitted and received by the base station and the terminal.
  • the terminal When the terminal is turned on or newly enters a cell, the terminal performs an initial cell search operation such as synchronizing with the base station (S601). To this end, the terminal receives a primary synchronization signal (PSS) and a secondary synchronization signal (PSS) from the base station to synchronize with the base station and obtain information such as a cell identifier (identifier, ID). can After that, the terminal can acquire intra-cell broadcast information by receiving a physical broadcast channel (PBCH) from the base station. Meanwhile, the terminal may check the downlink channel state by receiving a downlink reference signal (DL RS) in the initial cell search step.
  • PSS primary synchronization signal
  • PSS secondary synchronization signal
  • PBCH physical broadcast channel
  • DL RS downlink reference signal
  • the UE After completing the initial cell search, the UE obtains more detailed system information by receiving a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to information carried on the PDCCH. It can (S602).
  • a physical downlink control channel (PDCCH)
  • a physical downlink control channel (PDSCH)
  • S602 the UE obtains more detailed system information by receiving a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to information carried on the PDCCH. It can (S602).
  • PDCCH physical downlink control channel
  • PDSCH physical downlink control channel
  • the terminal may perform a random access procedure (RACH) to the base station (steps S603 to S606).
  • RACH random access procedure
  • the UE may transmit a specific sequence as a preamble through a physical random access channel (PRACH) (S603 and S605), and receive a response message to the preamble through a PDCCH and a corresponding PDSCH ( S604 and S606).
  • PRACH physical random access channel
  • a contention resolution procedure may be additionally performed.
  • the UE receives PDCCH/PDSCH as a general uplink/downlink signal transmission procedure (S607) and physical uplink shared channel (PUSCH)/physical uplink control channel (S607).
  • Control channel, PUCCH) transmission (S608) may be performed.
  • the terminal receives downlink control information (DCI) through the PDCCH.
  • DCI downlink control information
  • the DCI includes control information such as resource allocation information for a terminal, and has different formats depending on its purpose of use.
  • the control information that the terminal transmits to the base station through the uplink or the terminal receives from the base station is a downlink / uplink ACK / NACK (Acknowledgement / Non-Acknowledgement) signal, CQI (Channel Quality Indicator), PMI (Precoding Matrix) Indicator), RI (Rank Indicator), etc.
  • a terminal may transmit control information such as the above-described CQI/PMI/RI through PUSCH and/or PUCCH.
  • Table 5 shows an example of a DCI format in the NR system.
  • DCI format uses 0_0 Scheduling of PUSCH in one cell 0_1 Scheduling of one or multiple PUSCHs in one cell, or indication of cell group (CG) downlink feedback information to the UE 0_2 Scheduling of PUSCH in one cell 1_0 Scheduling of PDSCH in one DL cell 1_1 Scheduling of PDSCH in one cell 1_2 Scheduling of PDSCH in one cell
  • DCI formats 0_0, 0_1, and 0_2 are resource information related to PUSCH scheduling (eg, UL/SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), transport block ( transport block, TB) related information (eg, MCS (Modulation Coding and Scheme), NDI (New Data Indicator), RV (Redundancy Version), etc.), HARQ (Hybrid - Automatic Repeat and request) related information (eg , process number, downlink assignment index (DAI), PDSCH-HARQ feedback timing, etc.), multi-antenna related information (eg, DMRS sequence initialization information, antenna port, CSI request, etc.), power control information (eg, PUSCH power control, etc.), and control information included in each DCI format may be predefined.
  • PUSCH scheduling eg, UL/SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.
  • transport block transport block
  • DCI format 0_0 is used for PUSCH scheduling in one cell.
  • the information included in the DCI format 0_0 is CRC (cyclic redundancy check) by C-RNTI (cell radio network temporary identifier, Cell RNTI) or CS-RNTI (Configured Scheduling RNTI) or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI) ) is scrambled and transmitted.
  • C-RNTI cell radio network temporary identifier, Cell RNTI
  • CS-RNTI Configured Scheduling RNTI
  • MCS-C-RNTI Modulation Coding Scheme Cell RNTI
  • DCI format 0_1 is used to instruct the UE to schedule one or more PUSCHs in one cell or configured grant (configure grant, CG) downlink feedback information.
  • Information included in DCI format 0_1 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI (Semi-Persistent CSI RNTI) or MCS-C-RNTI.
  • DCI format 0_2 is used for PUSCH scheduling in one cell.
  • Information included in DCI format 0_2 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI or MCS-C-RNTI.
  • DCI formats 1_0, 1_1, and 1_2 are resource information related to PDSCH scheduling (eg, frequency resource allocation, time resource allocation, VRB (virtual resource block)-PRB (physical resource block) mapping, etc.), transport block (TB) related information (eg, MCS, NDI, RV, etc.), HARQ related information (eg, process number, DAI, PDSCH-HARQ feedback timing, etc.), multi-antenna related information (eg, antenna port , transmission configuration indicator (TCI), sounding reference signal (SRS) request, etc.), PUCCH-related information (eg, PUCCH power control, PUCCH resource indicator, etc.), and the control information included in each DCI format can be predefined.
  • PDSCH scheduling eg, frequency resource allocation, time resource allocation, VRB (virtual resource block)-PRB (physical resource block) mapping, etc.
  • transport block (TB) related information eg, MCS, NDI, RV, etc.
  • HARQ related information
  • DCI format 1_0 is used for PDSCH scheduling in one DL cell.
  • Information included in DCI format 1_0 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI or MCS-C-RNTI.
  • DCI format 1_1 is used for PDSCH scheduling in one cell.
  • Information included in DCI format 1_1 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI or MCS-C-RNTI.
  • DCI format 1_2 is used for PDSCH scheduling in one cell.
  • Information included in DCI format 1_2 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI or MCS-C-RNTI.
  • FIG. 7 is a diagram illustrating downlink transmission and reception operations in a wireless communication system to which the present disclosure may be applied.
  • the base station schedules downlink transmission such as frequency/time resources, transport layers, downlink precoders, and MCS (S1410).
  • the base station may determine a beam for PDSCH transmission to the terminal through the above-described operations.
  • the terminal receives DCI for downlink scheduling (ie, including PDSCH scheduling information) on the PDCCH from the base station (S1420).
  • DCI for downlink scheduling ie, including PDSCH scheduling information
  • DCI format 1_0, 1_1 or 1_2 may be used for downlink scheduling, and in particular, DCI format 1_1 includes the following information: DCI format identifier (Identifier for DCI formats), bandwidth part indicator, Frequency domain resource assignment, time domain resource assignment, PRB bundling size indicator, rate matching indicator, ZP CSI-RS trigger (ZP CSI -RS trigger), antenna port(s), transmission configuration indication (TCI), SRS request, demodulation reference signal (DMRS) sequence initialization (DMRS sequence initialization)
  • the number of DMRS ports can be scheduled, and SU (Single-user) / MU (Multi-user) transmission scheduling is possible.
  • the TCI field is composed of 3 bits, and the QCL for the DMRS is dynamically indicated by indicating up to 8 TCI states according to the TCI field value.
  • the terminal receives downlink data from the base station on the PDSCH (S1430).
  • the PDSCH is decoded according to an instruction by the corresponding DCI.
  • the UE may set the DMRS configuration type by the upper layer parameter 'dmrs-Type', and the DMRS type is used to receive the PDSCH.
  • the maximum number of front-loaded DMRA symbols for the PDSCH may be set by the upper layer parameter 'maxLength'.
  • DMRS configuration type 1 if a single codeword is scheduled for a UE and an antenna port mapped with an index of ⁇ 2, 9, 10, 11, or 30 ⁇ is designated, or a single codeword is scheduled and ⁇ 2, If an antenna port mapped with an index of 9, 10, 11, or 12 ⁇ or ⁇ 2, 9, 10, 11, 30, or 31 ⁇ is specified, or if two codewords are scheduled for a UE, the UE selects all remaining orthogonal It is assumed that one antenna port is not associated with PDSCH transmission to another terminal.
  • DMRS configuration type 2 if a single codeword is scheduled for the UE and an antenna port mapped with an index of ⁇ 2, 10, or 23 ⁇ is designated, or a single codeword is scheduled and ⁇ 2, 10, If an antenna port mapped with an index of 23 or 24 ⁇ or ⁇ 2, 10, 23, or 58 ⁇ is specified, or if two codewords are scheduled for a UE, the UE transmits all remaining orthogonal antenna ports to another UE. It is assumed that it is not associated with PDSCH transmission of
  • the precoding granularity P' is a contiguous resource block in the frequency domain.
  • P' may correspond to one of ⁇ 2, 4, broadband ⁇ .
  • P' is determined as wideband, the UE does not expect to be scheduled with non-contiguous PRBs, and the UE can assume that the same precoding is applied to the allocated resource.
  • the Precoding Resource Block Group (PRG) is divided into P' consecutive PRBs.
  • the number of actually consecutive PRBs in each PRG may be one or more.
  • the UE may assume that the same precoding is applied to consecutive downlink PRBs in the PRG.
  • the UE In order for the UE to determine the modulation order, target code rate, and transport block size in the PDSCH, the UE first reads the 5-bit MCD field in the DCI, and modulates the modulation order and target code determine the rate. Then, the redundancy version field in the DCI is read, and the redundancy version is determined. And, the UE determines the transport block size using the number of layers and the total number of allocated PRBs before rate matching.
  • Downlink SPS combines continuous scheduling through higher layer signaling (RRC, etc.) and dynamic scheduling of lower layer signaling (DCI, etc.). Continuous scheduling is used for periodic resource allocation for the first transmission of a transport block (TB). Dynamic scheduling is used to allocate resources for retransmission when retransmission is required.
  • RRC higher layer signaling
  • DCI lower layer signaling
  • continuous scheduling through higher layer signaling may be transmitted before dynamic scheduling (S1420) of lower layer signaling (DCI, etc.).
  • the UE may report SPS support to the eNB using the downlinkSPS flag in the UE capability information.
  • RRC signaling and physical layer signaling on PDCCH are combined and used.
  • RRC signaling eg, SPS-Config IE
  • SPS-Config IE provides a subset of resource allocation information, and additional information is provided by PDCCH.
  • PDCCH uses activation/release as a trigger.
  • SPS-Config IE is used to configure downlink semi-persistent transmission. Multiple downlink SPS configurations within one BWP of the serving cell may be configured.
  • SPS-Config :: SEQUENCE ⁇ periodicity ENUMERATED ⁇ ms10, ms20, ms32, ms40, ms64, ms80, ms128, ms160, ms320, ms640, spare6, spare5, spare4, spare3, spare2, spare1 ⁇ , nrofHARQ-Processes INTEGER (1..8), n1PUCCH-AN PUCCH-ResourceId OPTIONAL, -- Need M mcs-Table ENUMERATED ⁇ qam64LowSE ⁇ OPTIONAL, -- Need S ..., [[ sps-ConfigIndex-r16 SPS-ConfigIndex-r16 OPTIONAL, -- Cond SPS-List harq-ProcID-Offset-r16 INTEGER (0..15) OPTIONAL, -- Need R periodicityExt-r16 INTEGER (1..5120) OPTIONAL, -- Need R harq-CodebookID-r16 INTEGER (1
  • periodicity represents a period of a downlink SPS, which means a time interval between successive persistent resource allocations.
  • periodicityExt is used to calculate the period of downlink SPS, and if this parameter does not exist, periodicity is ignored.
  • the SPS period has different supported values depending on the set subcarrier spacing.
  • nrofHARQ-Processes indicates the number of HARQ processes configured for downlink SPS.
  • the HARQ process identifier is specified within the DCI associated with each resource allocation. However, in the downlink SPS, the identifier of the HARQ process is determined based on the nrofHARQ-Processes value and the periodicity value.
  • n1PUCCH-AN indicates HARQ resources of PUCCH for downlink SPS.
  • An actual PUCCH-Resource is set according to the value of n1PUCCH-AN, and based on this, PUCCH resources for transmitting HARQ ACK to the base station are identified.
  • mcs-Table indicates an MCS table used by the UE for downlink SPS.
  • the pdsch-AggregationFactor indicates the number of repetitions of the SPS PDSCH and may have one value among ⁇ 1,2,4,8 ⁇ . If this field does not exist, the UE applies pdsch-AggregationFactor of PDSCH-Config. That is, the terminal repeatedly receives the same downlink data/transport block (TB) in consecutive slots.
  • the same symbol allocation is applied over consecutive slots according to the set repetition number (pdsch-AggregationFactor). That is, the terminal repeatedly receives the downlink TB in the same symbol over several consecutive slots according to the set number of repetitions.
  • the PDSCH is limited to a single transmission layer.
  • a time interval for reception according to the number of repetitions is not larger than a period interval derived by a period obtained from SPS-config.
  • a redundancy version (rv_id) is determined differently for each TO of a TB.
  • rv_id the redundancy version indicated by DCI is 0.
  • the UE When a UE configured as an upper layer SPS receives DCI on a PDCCH, the UE first validates whether the downlink SPS assignment PDCCH is valid.
  • NDI new data indicator
  • the UE determines that the downlink SPS assignment PDCCH is valid for scheduling activation/scheduling release.
  • the terminal verifies whether the DCI format is valid as follows.
  • Table 7 exemplifies a field for verifying single downlink SPS scheduling activation when a single SPS PDSCH configuration is provided in a downlink BWP of a cell in which a UE is scheduled.
  • DCI format 1_1 HARQ process number set to all '0's Redundancy version
  • For enabled TB Form the enabled transport block: set to all '0's
  • Table 8 exemplifies fields for single downlink SPS descheduling verification when the terminal is provided with a single SPS PDSCH configuration within the downlink BWP of a scheduled cell.
  • the HARQ process number field in the DCI format indicates activation of the SPS PDSCH configuration with the same value as the index (i.e., sps-ConfigIndex) of a specific configuration among one or more SPS PDSCH configurations.
  • the RV (redundancy version) field of the DCI format is set as shown in Table 7 above, verification of the DCI format for SPS PDSCH activation is achieved.
  • the number field indicates SPS PDSCH release with the same value as the index of a specific configuration (ie, sps-ConfigDeactivationStateList or sps-ConfigIndex) of one or more SPS PDSCH configurations, and DCI format RV, MCS (modulation and coding schemen), FDRA
  • a specific configuration ie, sps-ConfigDeactivationStateList or sps-ConfigIndex
  • the UE may be configured to repeatedly receive the PDSCH. In this case, the UE repeatedly receives the same downlink data/transport block (TB) in consecutive slots.
  • TB downlink data/transport block
  • the number of repetitions for downlink TB may have one of ⁇ 2, 4, 8 ⁇ . That is, the same TB can be transmitted in consecutive 2 slots, 4 slots, or 8 slots. There is one TB transmission (ie, one transmission occasion (TO)) in each slot. If the number of repetitions is not set (that is, there is no pdsch-AggregationFactor), the UE applies a value of 1.
  • the UE When the UE receives a PDSCH scheduled by DCI, if the UE is set to repetition number > 1 (eg, pdsch-AggregationFactor > 1), the same symbol allocation is applied over consecutive slots according to the set repetition number. . That is, the terminal repeatedly receives the downlink TB in the same symbol over several consecutive slots according to the set number of repetitions.
  • repetition number > 1 eg, pdsch-AggregationFactor > 1
  • the same symbol allocation is applied over consecutive slots according to the set repetition number. . That is, the terminal repeatedly receives the downlink TB in the same symbol over several consecutive slots according to the set number of repetitions.
  • the PDSCH is limited to a single transmission layer.
  • a redundancy version (rv_id) is determined differently for each TO of a TB. That is, based on the redundancy version indicated by the DCI scheduling the PDSCH, the redundancy version applied to the n-th TO is determined according to Table 9 below.
  • Table 9 illustrates the redundancy version applied when pdsch-AggregationFactor is present.
  • FIG. 8 illustrates a multiple TRP transmission scheme in a wireless communication system to which the present disclosure can be applied.
  • the layer group may mean one or a predetermined layer set composed of one or more layers.
  • the amount of transmission resources increases due to the number of layers, and through this, there is an advantage that robust channel coding of a low code rate can be used for TB, and also, since the channels are different from multiple TRPs, diversity ), the reliability of the received signal can be expected to be improved based on the gain.
  • FIG. 8(b) an example of transmitting different CWs through layer groups corresponding to different TRPs is shown.
  • TBs corresponding to CW #1 and CW #2 in the figure are the same. That is, CW #1 and CW #2 mean that the same TB is converted into different CWs through channel coding or the like by different TRPs. Therefore, it can be regarded as an example of repeated transmission of the same TB.
  • the code rate corresponding to TB is high.
  • the code rate can be adjusted by indicating different RV (redundancy version) values for the encoded bits generated from the same TB, or the modulation order of each CW can be adjusted. has the advantage of being
  • the same TB is repeatedly transmitted through different layer groups, and each layer group is transmitted by a different TRP / panel, so that the terminal receives data can increase your odds.
  • This is referred to as a Spatial Division Multiplexing (SDM) based M-TRP URLLC transmission scheme.
  • SDM Spatial Division Multiplexing
  • Layers belonging to different layer groups are transmitted through DMRS ports belonging to different DMRS CDM groups.
  • the same TB is transmitted in one layer or set of layers, and each layer or set of each layer is associated with one TCI and one set of DMRS port (s).
  • a single codeword with one RV is used in all spatial layers or all set of layers. From the UE point of view, different coded bits are mapped to different layers or sets of layers using the same mapping rules.
  • the same TB is transmitted in one layer or set of layers, and each layer or set of layers is associated with one TCI and one DMRS port (s) set.
  • a single codeword with one RV is used in each spatial layer or set of each layer.
  • the RV(s) corresponding to each spatial layer or set of each layer may be the same or different.
  • the same TB having one DMRS port associated with multiple TCI state indexes is transmitted in one layer, or multiple DMRS ports associated with multiple TCI state indexes one-to-one The same TB is transmitted in one layer.
  • Each non-overlapping frequency resource allocation is associated with one TCI state.
  • the same single/multiple DMRS port(s) are associated with all non-overlapping frequency resource allocations.
  • a single codeword with one RV is used for all resource allocation. From the UE point of view, common RB matching (mapping of codewords to layers) is applied in all resource allocations.
  • RVs corresponding to each non-overlapping frequency resource allocation may be the same or different.
  • TDM Technique 3
  • Each transmission occasion of TB has a time granularity of mini-slots and has one TCI and one RV.
  • a common MCS is used for single or multiple DMRS port(s) at all transmission occasions within a slot.
  • - RV/TCI may be the same or different at different transmission occasions.
  • TDM Technique 4
  • Each transmission occasion of TB has one TCI and one RV.
  • - RV/TCI may be the same or different at different transmission occasions.
  • Multi-TRP multiple TRP, M-TRP
  • the M-TRP transmission method in which M TRPs transmit data to one terminal, is divided into eMBB M-TRP transmission method, which is a method for greatly increasing the transmission rate, and URLLC M-TRP transmission method, which is a method for increasing the reception success rate and reducing latency. can share
  • the M-TRP transmission method is i) M-DCI (multiple DCI) based M-TRP transmission method in which each TRP transmits a different DCI and ii) S-DCI in which one TRP transmits DCI (single DCI) based M-TRP transmission method.
  • M-DCI multiple DCI
  • S-DCI single DCI
  • S-DCI single DCI
  • the M-TRP URLLC transmission method means a method in which multiple TPRs transmit the same data/DCI using different space (eg, layer/port)/time/frequency resources.
  • TRP 1 may transmit specific data/DCI in resource 1
  • TRP 2 may transmit the specific data/DCI (ie, the same data/DCI) in resource 2.
  • the terminal can receive the same data/DCI using different space/time/frequency resources.
  • the terminal may receive an indication of the QCL RS/type (ie, DL TCI state) used in the space/time/frequency resource receiving the corresponding data/DCI from the base station.
  • the terminal may receive instructions from the base station for the DL TCI state used in resource 1 and the DL TCI state used in resource 2.
  • High reliability can be achieved by the terminal receiving corresponding data/DCI through resource 1 and resource 2.
  • This M-TRP URLLC transmission scheme may be applied to PDSCH/PDCCH.
  • the M-TRP eMBB transmission scheme refers to a scheme in which M-TRP transmits different data/DCI using different space/time/frequency resources.
  • the terminal may receive a plurality of TCI states from the base station through DCI, and assume that data received using the QCL RS indicated by each of the plurality of TCI states is different data.
  • the terminal can determine whether specific transmission/reception is M-TRP URLLC transmission/reception or M-TRP eMBB transmission/reception. For example, when the RNTI for URLLC is used and CRC is masked for DCI, the terminal can recognize the transmission as URLLC transmission. And, when the RNTI for eMBB is used and CRC masked for DCI, the UE can identify the corresponding transmission as eMBB transmission. As another example, the base station may set the M-TRP URLLC transmission/reception method or the M-TRP eMBB transmission/reception method to the terminal through new signaling.
  • the present disclosure can be extended and applied even in a multiple TRP environment of 3 or more, and can be extended and applied even in an environment where transmission/reception is performed using different panels or beams in the same TRP.
  • the UE may recognize different TRPs as different TCI states.
  • the terminal transmits/receives data/DCI/UCI using TCI state 1, it means that data/DCI/UCI/ is transmitted/received from (or through TRP 1).
  • Enhancement of the SFN transmission method in which the M-TRP transmits the same data together through the same layer / same DMRS port in the same time / frequency domain is in progress.
  • TRP 1 and TRP 2 may transmit the same data to the terminal using the same DMRS port and the same time/frequency resource.
  • the DMRS port transmits both QCL beam information for TRP 1 and QCL beam information for TRP 2. can be set.
  • a channel estimated through the DMRS port may be a composite channel in which the DL channel of TRP 1 and the DL channel of TRP 2 are combined. At this time, since the phases of the channels of each TRP are not aligned with each other, a constructive sum or a destructive sum is randomly performed on the channels of each TRP. this can be created.
  • the SFN transmission scheme can be regarded as one type of M-TRP NCJT scheme, and since M-TRP transmits a common layer, it can be referred to as a common layer NCJT.
  • NJT Non-coherent joint transmission
  • the NCJT method means a method in which multiple TPs (transmission points) transmit data to one terminal using the same time frequency, and data can be transmitted to different layers using different DMRS ports between TPs.
  • the TP may deliver data scheduling information to a terminal receiving the NCJT through DCI.
  • a method in which each TP participating in NCJT transfers scheduling information for data transmitted by itself to DCI may be referred to as multi-DCI based NCJT. Since each of the N TPs participating in NCJT transmission transmits DL grant DCI and PDSCH to the UE, the UE can receive N DCIs and N PDSCHs from the N TPs.
  • a method in which one representative TP transfers scheduling information for data transmitted by itself and data transmitted by another TP through one DCI may be referred to as a single DCI-based NCJT.
  • N TPs may transmit one PDSCH.
  • each TP can transmit only some of the multi-layers constituting one PDSCH. For example, when layer 4 data is transmitted, TP 1 transmits layer 2, and TP 2 transmits the remaining 2 layers to the terminal.
  • NCJT can be divided into a fully overlapped NCJT in which time-frequency resources transmitted by each TP completely overlap and a partially overlapped NCJT in which only some time-frequency resources are overlapped. That is, in the case of partially overlapping NCJT, both data of TP 1 and TP 2 may be transmitted in some time-frequency resources, and only data of TP 1 or TP 2 may be transmitted in the remaining time-frequency resources.
  • the terminal determines the list determined from the serving cell index Antenna port QCL provided by TCI state (s) having the same activated TCI state ID value for CORESET (s) having the same index in all configured DL BWPs of all configured cells on the above may be applied.
  • the TCI state ID, CORESET index, and serving cell index may be provided by a (UE-specific PDCCH) MAC CE command.
  • a corresponding MAC CE ie, UE-specific PDCCH MAC CE for indicating TCI status
  • the serving cell ID field may indicate identification information (eg, serving cell index or ID) of a serving cell to which a corresponding MAC CE is applied.
  • the serving cell ID field may have a length of 5 bits, but is not limited thereto.
  • the serving cell indicated by the serving cell ID field is configured as part of specific configuration information (eg, 'simultaneousTCI-UpdateList1' or 'simultaneousTCI-UpdateList2') (ie, the indicated serving cell is a serving cell list according to specific configuration information)
  • the corresponding MAC CE may be applied to each of all serving cells included in the serving cell list.
  • the CORESET ID field may indicate a CORESERT identified as 'ControlResourceSetId' indicating a TCI state. If the value of the CORESET ID field is 0, the corresponding field may indicate a CORESET set by 'controlResourceSetZero'.
  • the size of the CORESET ID field may be 4 bits, but is not limited thereto.
  • the TCI State ID field may indicate a TCI state identified by 'TCI-StateId' applicable to the CORESET identified by the CORESET ID field.
  • the TCI state ID field is the first 64 TCIs set by 'tci-StatesToAddModList' and 'tci-StatesToReleaseList' in 'PDSCH-Config' of the active BWP.
  • 'TCI-StateId' of the state can be indicated.
  • the TCI state ID fields are 'tci-tatesPDCCH-ToAddList' and 'tci-StatesPDCCH-ToReleaseList' in the 'controlResourceSet' identified by the indicated CORESET ID. 'TCI-StateId' set by '.
  • an enhanced MAC CE for PDCCH that activates multiple TCI states (eg, up to two TCI states) for single frequency network (SFN) based PDCCH transmission may be used.
  • the enhanced MAC CE may include at least a serving cell ID field, a CORESET ID field and two TCI state IDs. That is, the enhanced MAC CE may have an additional TCI state ID field compared to the aforementioned MAC CE.
  • CA carrier aggregation
  • an RRC configuration set of serving cells that can be addressed by a single MAC CE may be supported, and an improved MAC CE may be applied to a CORESET configured with 'CORESETPoolindex'.
  • the improved SFN PDCCH transmission scheme may be identified by the number of activated TCI states for each CORESET and RRC parameter.
  • the same parameters related to the SFN PDCCH transmission scheme may be used for PDCCH and PDSCH.
  • a serving cell list to simultaneously update a beam ie, TCI state
  • TCI state When the TCI state is updated for a specific CORESET within a serving cell included in the serving cell list, all CORESETs having the same index as a specific CORESET within one or more serving cells included in the serving cell list may be updated to the same TCI state. there is.
  • multiple TCI states can be activated for each CORESET
  • multiple TCI states can be updated for CORESETs having the same index in all cells included in the serving cell list.
  • a plurality of TCI states may be activated for a specific CORESET only when parameters (eg, parameters transmitted by RRC signaling) related to the enhanced SFN PDCCH are set for the specific CORESET.
  • the present disclosure describes a method of performing SFN scheme configuration/TCI state activation for a plurality of serving cells in order to resolve the ambiguity.
  • FIG. 10 is a diagram for explaining an operation of receiving a PDCCH of a terminal in a wireless communication system to which the present disclosure can be applied.
  • the terminal may receive first configuration information related to a serving cell list including a plurality of serving cells for which at least one transmission configuration indicator (TCI) state is simultaneously updated (S1010) .
  • TCI transmission configuration indicator
  • the first configuration information may include information for configuring a list of serving cells capable of simultaneously updating the TCI relationship (eg, TCI state) by the MAC CE. Accordingly, when a specific TCI state is set/activated/instructed by MAC CE for a specific CORESET of a specific serving cell included in the list of serving cells, a specific CORESET set for other serving cells included in the list of serving cells A specific TCI state can be set/activated/instructed for a CORESET having the same index as CORESET.
  • the first setting information may be 'simultaneousTCI-UpdateList1', 'simultaneousTCI-UpdateList2', 'simultaneousU-TCI-UpdateList1', 'simultaneousU-TCI-UpdateList2', 'simultaneousU-TCI-UpdateList3', or 'simultaneousU-TCI-UpdateList1'.
  • At least one of UpdateList4' may be included.
  • U-TCI may mean a unified TCI state capable of indicating a DL/UL TCI state.
  • the terminal may receive, from the base station, first information for configuring a single frequency network (SFN) scheme for a first control resource set (CORESET) of a first serving cell among a plurality of serving cells ( S1020).
  • SFN single frequency network
  • CORESET first control resource set
  • the SFN scheme is set for one or more specific CORESETs having the same index as the first CORESET among at least one CORESET configured for the remaining serving cells other than the first serving cell among a plurality of serving cells included in the serving cell list. It can be.
  • the terminal may receive the first information from the base station through an RRC message (eg, 'sfnSchemePDCCH').
  • the first information may be used to configure an SFN scheme for PDCCH.
  • the SFN scheme may be set for one or more specific CORESETs based on the first information.
  • the 1st CORESET and The SFN method may be set by the first information for the CORESET having the same index.
  • the terminal may receive a medium access control (MAC) control element (CE) including second information for setting/instructing/activating a plurality of TCI states for the first CORESET from the base station.
  • MAC medium access control
  • CE control element
  • one or more specific CORESETs ie, serving cell list
  • a plurality of TCI states may be set/instructed/activated for CORESETs having the same index as the first CORESET set for the remaining serving cells except for the first serving cell included in.
  • a plurality of TCI states may be set/instructed/activated based on the MAC CE for one or more specific CORESETs regardless of whether the SFN scheme is configured for one or more specific CORESETs.
  • an SFN scheme may be set for one or more specific CORESETs. That is, based on the MAC CE being received from the base station, an SFN scheme may be configured for one or more specific CORESETs.
  • the aforementioned MAC CE may include second information including an ID (identity) of the first serving cell, an ID of the first CORESET, and an ID of each of a plurality of TCI states.
  • a UE may receive second configuration information from a base station for configuring at least one TCI state combination composed of at least one TCI state in units of serving cells or bandwidth parts.
  • the aforementioned MAC CE may include an index of a specific TCI state combination including a plurality of TCI states to be set for the first CORESET among at least one TCI state combination.
  • the terminal may receive the first information from the base station through downlink control information (DCI).
  • DCI downlink control information
  • the SFN scheme may be set for the one or more specific CORESETs based on the first information.
  • the terminal may receive the PDCCH from the base station based on the SFN scheme in the first CORESET (S1030). That is, the terminal can receive the SFN-based PDCCH from the base station using a plurality of TCI states.
  • the terminal when the SFN scheme is set to the first scheme (eg, 'sfnSchemeA') by the first configuration information (eg, 'sfnSchemePDCCH') for the terminal and two TCI states are activated in the first CORESET, the terminal It can be assumed that the DM-RS port of the PDCCH in the first CORESET and the DL RS in the two TCI states have a QCL relationship.
  • the first scheme eg, 'sfnSchemeA'
  • the first configuration information eg, 'sfnSchemePDCCH'
  • the SFN scheme is set to the second scheme (eg, 'sfnSchemeB') by the first configuration information (eg, 'sfnSchemePDCCH') for the UE, and two TCI states are activated in the first CORESET
  • the UE has 1) the DM-RS port of the PDCCH in the first CORESET and 2) the DL RS of the two TCI states excluding the QCL parameters ⁇ Doppler shift, Doppler spread ⁇ of the second indicated TCI state It can be assumed to have a QCL relationship.
  • FIG. 11 is a diagram for explaining an operation of transmitting a PDCCH of a base station in a wireless communication system to which the present disclosure can be applied.
  • the base station may transmit first configuration information related to a serving cell list including a plurality of serving cells for which at least one TCI state is simultaneously updated to the terminal (S1110).
  • the base station may transmit first information for setting the SFN scheme for the first CORESET of the first serving cell among the plurality of serving cells to the terminal (S1120).
  • the base station may transmit the PDCCH to the terminal based on the SFN scheme in the first CORESET (S1130).
  • the SFN scheme may be set for one or more specific CORESETs having the same index as the first CORESET among at least one CORESET configured for the remaining serving cells other than the first serving cell among the plurality of serving cells.
  • Operations and parameters according to steps S1110, S1120, and S1130 may correspond to operations and parameters according to steps S1010, S1020, and S1030, and duplicate descriptions will be omitted.
  • L1 signaling may mean DCI-based dynamic signaling between a base station and a terminal
  • L2 signaling may mean RRC/MAC CE-based higher layer signaling between a base station and a terminal.
  • the base station may configure/instruct a serving cell list including one or more serving cells for the terminal through specific configuration information (eg, 'simultaneousTCI-UpdateList1' or 'simultaneousTCI-UpdateList2').
  • specific configuration information eg, 'simultaneousTCI-UpdateList1' or 'simultaneousTCI-UpdateList2'.
  • an enabler for an SFN scheme for a first CORESET configured in a first serving cell included in a serving cell list is configured for a UE by L1/L2 signaling.
  • CORESET(s) having the same index as the first CORESET among the CORESETs set for one or more serving cells included in the serving cell list (excluding the first serving cell at this time) based on the enabler The SFN scheme can be set/instructed in the same way.
  • the SFN scheme may be configured for other serving configurations included in the serving cell list.
  • the terminal can expect reception of the SFN PDCCH.
  • the enabler for the SFN scheme when one TCI state is configured/instructed/activated for a specific CORESET, the UE can expect to receive a single TRP PDCCH.
  • the base station may configure/instruct a serving cell list including one or more serving cells for the terminal through specific configuration information (eg, 'simultaneousTCI-UpdateList1' or 'simultaneousTCI-UpdateList2').
  • specific configuration information eg, 'simultaneousTCI-UpdateList1' or 'simultaneousTCI-UpdateList2'.
  • an enabler for the SFN scheme is set for the UE by L1/L2 signaling, and the 1st CORESET is configured through the MAC CE. It is assumed that a plurality of TCI states are activated in .
  • the same TCI state as the plurality of TCI states activated for the first CORESET may be activated.
  • an enabler for the SFN method may be set/instructed for a CORESET having the same index as the first CORESET. For example, when a MAC CE for activating/setting/instructing multiple TCI states for a first CORESET is received from a base station, an enabler for an SFN scheme and the multiple TCI states for a CORESET having the same index are Can be set/directed together.
  • the enabler setting for the SFN scheme and the activation of multiple TCI states for other serving cells included in the serving cell list are performed through MAC CE transmission without separate RRC configuration to enable the SFN scheme. It could be possible.
  • the terminal can expect reception of the SFN PDCCH.
  • the enabler for the SFN scheme when one TCI state is configured/instructed/activated for a specific CORESET, the UE can expect to receive a single TRP PDCCH.
  • One or more TCI phase combinations may be configured/instructed for CORESET on a serving cell and/or BWP basis.
  • the TCI state combination may consist of one or more TCI states.
  • the UE can expect SFN PDCCH transmission for the CORESET.
  • the base station may update the TCI status for the first CORESET through the MAC CE.
  • the MAC CE may indicate a specific combination among a plurality of TCI state combinations for the first CORESET.
  • a specific TCI state combination is indicated through the MAC CE for the first CORESET configured in the first serving cell.
  • the same as the first CORESET among CORESET(s) set in other serving cell(s) ie, serving cells other than the first serving cell among a plurality of serving cells included in the serving cell list) other than the first serving cell.
  • the TCI state may be updated by referring to the index of a specific TCI state combination for the CORESET(s) having the index.
  • the serving cell list may be configured/instructed for the terminal by specific configuration information (eg, 'simultaneousTCI-UpdateList1' or 'simultaneousTCI-UpdateList2').
  • specific configuration information eg, 'simultaneousTCI-UpdateList1' or 'simultaneousTCI-UpdateList2'.
  • the TCI state may be updated based on the TCI state combination of the same index. Additionally or alternatively, in the case of a serving cell in which the TCI state combination is not configured/indicated, the TCI state may be updated based on the TCI state corresponding to the index.
  • beams ie, TCI states
  • a plurality of serving cells may be simultaneously updated based on the combination of TCI states.
  • Example 1, Example 2, and Example 3 may be applied/performed independently, but is not limited thereto.
  • Embodiment 1, Embodiment 2, and Embodiment 3 may be applied/performed in combination with each other.
  • FIG. 12 is a diagram for explaining a signaling procedure of a network side and a terminal according to an embodiment of the present disclosure.
  • a network side eg, in an M-TRP situation to which the examples of the present disclosure described above (eg, embodiment 1, embodiment 2, embodiment 3, or a combination of one or more of the detailed examples) may be applied) It shows an example of signaling between a network side) and a terminal (UE).
  • UE terminal
  • the UE/network side is exemplary and can be applied to various devices as described with reference to FIG. 13 . 12 is for convenience of description and does not limit the scope of the present disclosure. In addition, some step(s) shown in FIG. 12 may be omitted depending on circumstances and/or settings. In addition, in the operation of the network side / UE of FIG. 12, the above-described uplink transmission/reception operation, M-TRP related operation, etc. may be referred to or used.
  • the network side may be one base station including a plurality of TRPs, or may be one cell including a plurality of TRPs.
  • the network side may include a plurality of remote radio heads (RRHs)/remote radio units (RRUs).
  • RRHs remote radio heads
  • RRUs remote radio units
  • an ideal/non-ideal backhaul may be established between TRP 1 and TRP 2 constituting the network side.
  • RRHs remote radio heads
  • RRUs remote radio units
  • TRP refers to a panel, an antenna array, and a cell (eg, macro cell/small cell/ It may be replaced with expressions such as a pico cell, etc.), a transmission point (TP), a base station (base station, gNB, etc.) and may be applied.
  • TRPs may be classified according to information (eg, CORESET index, ID) on the CORESET group (or CORESET pool).
  • CORESET groups or CORESET pools
  • Configuration of such a CORESET group may be performed through higher layer signaling (eg, RRC signaling, etc.).
  • a base station may mean a generic term for an object that transmits and receives data with a terminal.
  • the base station may be a concept including one or more transmission points (TPs), one or more transmission and reception points (TRPs), and the like.
  • the TP and/or the TRP may include a panel of a base station, a transmission and reception unit, and the like.
  • the terminal may receive configuration information from the network side through/using TRP1 and/or TRP2 (S105).
  • the setting information may include information related to network-side configuration (ie, TRP configuration), resource allocation information related to transmission and reception based on M-TRP, and the like.
  • the configuration information may be transmitted through higher layers (eg, RRC, MAC CE).
  • the configuration information may include information related to uplink transmission based on a configured grant (CG).
  • CG configured grant
  • the configuration information includes information related to whether SFN is operating (eg, whether a high speed scenario (HST)-SFN is operating), information related to a TCI state, information for configuring a QCL RS, or DMRS port (s). It may include at least one of information about.
  • HST high speed scenario
  • DMRS port DMRS port
  • a plurality of (different) TCI states may be configured for DMRS port(s) related to a control channel (eg, PDCCH) based on the configuration information.
  • a control channel eg, PDCCH
  • activation/deactivation may be set for a TCI state in which a plurality of TCI states are set/activated/instructed and/or added for a specific CORESET based on the configuration information.
  • a combination of candidate TCI states that can be configured as multiple TCI states may be set according to the configuration information.
  • the configuration information may include information on a TCI state combination.
  • an operation in which the UE (100 or 200 in FIG. 13 ) receives the setting information from the network side (200 or 100 in FIG. 13 ) in step S105 may be implemented by the device of FIG. 13 to be described below.
  • one or more processors 102 may control one or more transceivers 106 and/or one or more memories 104 to receive the configuration information, and the one or more transceivers 106 may receive the configuration information from the network side.
  • the terminal may receive control information from the network side (S110).
  • the terminal may receive the control information through a control channel (eg, PDCCH).
  • a control channel eg, PDCCH
  • the control information may include DCI.
  • the control information determines whether SFN is operating (eg, HST- SFN operation or not), TCI state (s), QCL relationship, and / or information on DMRS port (s).
  • SFN eg, HST- SFN operation or not
  • TCI state e.g., HST- SFN operation or not
  • TCI state e.g., SFN state
  • QCL relationship e.g., QCL relationship
  • DMRS port e.g., DMRS port
  • a plurality of TCI states may be indicated/configured by a TCI state field in the control information (eg, DCI).
  • the terminal can perform channel estimation/compensation and receive the control information. For example, based on the above-described embodiment (eg, embodiment 1, embodiment 2, embodiment 3, or a combination of one or more of the detailed examples, etc.), the terminal may assume SFN transmission, and the TCI state Control channel (eg, PDCCH) estimation / compensation may be performed based on the QCL RS corresponding to .
  • the TCI state Control channel eg, PDCCH
  • an operation in which the UE (100 or 200 of FIG. 13 ) in step S110 receives the control information from the network side (200 or 100 of FIG. 13 ) may be implemented by the device of FIG. 13 to be described below.
  • one or more processors 102 may control one or more transceivers 106 and/or one or more memories 104 to receive the control information, and the one or more transceivers 106 may receive the control information from the network side.
  • the terminal may transmit uplink to the network side or receive downlink (S115).
  • the terminal may receive data from the network side through the PDSCH.
  • the data may be scheduled based on the control information.
  • the data may be transmitted from the network side to the terminal based on the information set/instructed in step S105/S110.
  • the terminal can perform channel estimation/compensation and receive the data.
  • the terminal may assume SFN transmission, and the TCI state Channel estimation/compensation may be performed based on the QCL RS corresponding to .
  • the UE can assume that the DMRS port is configured in the SFN method based on the plurality of TCI states. there is. And, the UE may perform channel estimation/compensation based on QCL RSs corresponding to the TCI state.
  • the terminal (100 or 200 in FIG. 13) in step S115 described above transmits an uplink to the network side (200 or 100 in FIG. 13) or receives a downlink from the network side (200 or 100 in FIG. 13).
  • the operation may be implemented by the device of FIG. 13 to be described below.
  • one or more processors 102 may control one or more transceivers 106 and/or one or more memories 104 to transmit uplink or receive downlink. It can transmit uplink or receive downlink.
  • FIG. 13 illustrates a block configuration diagram of a wireless communication device according to an embodiment of the present disclosure.
  • the first device 100 and the second device 200 may transmit and receive radio signals through various radio access technologies (eg, LTE and NR).
  • various radio access technologies eg, LTE and NR.
  • the first device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and/or one or more antennas 108.
  • the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or flowcharts of operations set forth in this disclosure.
  • the processor 102 may process information in the memory 104 to generate first information/signal, and transmit a radio signal including the first information/signal through the transceiver 106.
  • the processor 102 may receive a radio signal including the second information/signal through the transceiver 106, and then store information obtained from signal processing of the second information/signal in the memory 104.
  • the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 .
  • memory 104 may perform some or all of the processes controlled by processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed in this disclosure. It may store software codes including them.
  • the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
  • the transceiver 106 may be coupled to the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 .
  • the transceiver 106 may include a transmitter and/or a receiver.
  • the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
  • a device may mean a communication modem/circuit/chip.
  • the second device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
  • the processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or flowcharts of operations set forth in this disclosure.
  • the processor 202 may process information in the memory 204 to generate third information/signal, and transmit a radio signal including the third information/signal through the transceiver 206.
  • the processor 202 may receive a radio signal including the fourth information/signal through the transceiver 206 and store information obtained from signal processing of the fourth information/signal in the memory 204 .
  • the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 .
  • memory 204 may perform some or all of the processes controlled by processor 202, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed in this disclosure. It may store software codes including them.
  • the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
  • the transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 .
  • the transceiver 206 may include a transmitter and/or a receiver.
  • the transceiver 206 may be used interchangeably with an RF unit.
  • a device may mean a communication modem/circuit/chip.
  • one or more protocol layers may be implemented by one or more processors 102, 202.
  • one or more processors 102, 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
  • One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed herein.
  • PDUs Protocol Data Units
  • SDUs Service Data Units
  • processors 102, 202 may generate messages, control information, data or information in accordance with the descriptions, functions, procedures, proposals, methods and/or operational flow diagrams set forth in this disclosure.
  • One or more processors 102, 202 may process PDUs, SDUs, messages, control information, data or signals containing information (e.g., baseband signals) according to the functions, procedures, proposals and/or methods disclosed herein. generated and provided to one or more transceivers (106, 206).
  • One or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206, the descriptions, functions, procedures, suggestions, methods and/or described in this disclosure.
  • PDUs, SDUs, messages, control information, data or information may be acquired according to the operational flowcharts.
  • One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor or microcomputer.
  • One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs Field Programmable Gate Arrays
  • the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed in this disclosure may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like.
  • Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed in this disclosure may be included in one or more processors (102, 202) or stored in one or more memories (104, 204). It can be driven by the above processors 102 and 202.
  • the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed in this disclosure may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
  • One or more memories 104, 204 may be coupled with one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions.
  • One or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
  • One or more memories 104, 204 may be located internally and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be coupled to one or more processors 102, 202 through various technologies, such as wired or wireless connections.
  • One or more transceivers 106, 206 may transmit user data, control information, radio signals/channels, etc., as referred to in the methods and/or operational flow charts of this disclosure, to one or more other devices.
  • the one or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in the descriptions, functions, procedures, proposals, methods and/or operational flow charts, etc. disclosed in this disclosure from one or more other devices. there is.
  • one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals.
  • one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices. Additionally, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers 106, 206 may be coupled with one or more antennas 108, 208, and one or more transceivers 106, 206 may be connected to one or more antennas 108, 208, as described herein. , procedures, proposals, methods and / or operation flowcharts, etc. can be set to transmit and receive user data, control information, radio signals / channels, etc.
  • one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • One or more transceivers (106, 206) convert the received radio signals/channels from RF band signals in order to process the received user data, control information, radio signals/channels, etc. using one or more processors (102, 202). It can be converted into a baseband signal.
  • One or more transceivers 106 and 206 may convert user data, control information, and radio signals/channels processed by one or more processors 102 and 202 from baseband signals to RF band signals.
  • one or more of the transceivers 106, 206 may include (analog) oscillators and/or filters.
  • the scope of the present disclosure is software or machine-executable instructions (eg, operating systems, applications, firmware, programs, etc.) that cause operations in accordance with the methods of various embodiments to be executed on a device or computer, and such software or It includes a non-transitory computer-readable medium in which instructions and the like are stored and executable on a device or computer. Instructions that may be used to program a processing system that performs the features described in this disclosure may be stored on/in a storage medium or computer-readable storage medium and may be viewed using a computer program product that includes such storage medium. Features described in the disclosure may be implemented.
  • the storage medium may include, but is not limited to, high speed random access memory such as DRAM, SRAM, DDR RAM or other random access solid state memory devices, one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or It may include non-volatile memory, such as other non-volatile solid state storage devices.
  • the memory optionally includes one or more storage devices located remotely from the processor(s).
  • the memory, or alternatively, the non-volatile memory device(s) within the memory includes non-transitory computer readable storage media.
  • Features described in this disclosure may be stored on any one of the machine readable media to control hardware of a processing system and to allow the processing system to interact with other mechanisms that utilize results according to embodiments of the present disclosure. It may be integrated into software and/or firmware.
  • Such software or firmware may include, but is not limited to, application code, device drivers, operating systems, and execution environments/containers.
  • the wireless communication technology implemented in the devices 100 and 200 of the present disclosure may include Narrowband Internet of Things for low power communication as well as LTE, NR, and 6G.
  • NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2. no.
  • the wireless communication technology implemented in the devices 100 and 200 of the present disclosure may perform communication based on LTE-M technology.
  • LTE-M technology may be an example of LPWAN technology, and may be called various names such as eMTC (enhanced machine type communication).
  • LTE-M technologies are 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) It may be implemented in at least one of various standards such as LTE M, and is not limited to the above-mentioned names.
  • the wireless communication technology implemented in the devices 100 and 200 of the present disclosure includes at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low power communication. It may include one, but is not limited to the above-mentioned names.
  • ZigBee technology can generate personal area networks (PANs) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and can be called various names.
  • PANs personal area networks
  • the method proposed in the present disclosure has been described focusing on examples applied to 3GPP LTE/LTE-A and 5G systems, but can be applied to various wireless communication systems other than 3GPP LTE/LTE-A and 5G systems.

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Abstract

Sont divulgués un procédé et un appareil d'émission et de réception d'un PDCCH dans un système de communication sans fil. Le procédé par lequel un terminal reçoit un PDCCH, selon un mode de réalisation de la présente divulgation, comprend les étapes consistant : à recevoir, en provenance d'une station de base, des premières informations de configuration relatives à une liste de cellules de desserte comportant une pluralité de cellules de desserte pour lesquelles au moins un état d'indicateur de configuration d'émission (TCI) est simultanément mis à jour ; à recevoir, en provenance de la station de base, des premières informations permettant de configurer un schéma de réseau monofréquence (SFN) correspondant à un premier CORESET d'une première cellule de desserte parmi la pluralité de cellules de desserte ; et à recevoir, en provenance de la station de base sur la base du schéma SFN, le PDCCH dans le premier CORESET, le schéma SFN pouvant être configuré pour un ou plusieurs CORESET spécifiques, présentant les mêmes indices que le premier CORESET, parmi au moins un CORESET configuré pour les cellules de desserte restantes autres que la première cellule de desserte parmi la pluralité de cellules de desserte.
PCT/KR2022/012316 2021-08-20 2022-08-18 Procédé et appareil d'émission et de réception de canal de commande de liaison descendante physique (pdcch) dans un système de communication sans fil WO2023022529A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190281587A1 (en) * 2018-05-10 2019-09-12 Yushu Zhang User equipment (ue) downlink transmission configuration indication (tci)-state selection

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Publication number Priority date Publication date Assignee Title
US20190281587A1 (en) * 2018-05-10 2019-09-12 Yushu Zhang User equipment (ue) downlink transmission configuration indication (tci)-state selection

Non-Patent Citations (4)

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Title
LG ELECTRONICS: "Enhancements on beam management for multi-TRP", 3GPP DRAFT; R1-2103507, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210412 - 20210420, 7 April 2021 (2021-04-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052178226 *
NOKIA, NOKIA SHANGHAI BELL: "Enhancements for HST-SFN deployment", 3GPP DRAFT; R1-2108056, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e Meeting; 20210816 - 20210827, 6 August 2021 (2021-08-06), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052033753 *
QUALCOMM INCORPORATED: "Enhancements on HST-SFN deployment", 3GPP DRAFT; R1-2104657, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210510 - 20210527, 12 May 2021 (2021-05-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052010908 *
QUALCOMM INCORPORATED: "Enhancements on HST-SFN deployment", 3GPP DRAFT; R1-2107327, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210816 - 20210827, 7 August 2021 (2021-08-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052038279 *

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